kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 2989 Comm: kworker/u4:5 Not tainted 4.14.176-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: tipc_send tipc_send_work
task: ffff88809db34580 task.stack: ffff88809dae8000
RIP: 0010:__lock_acquire+0x1ba/0x4620 kernel/locking/lockdep.c:3365
RSP: 0000:ffff88809daef8a0 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 000000000000473b RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffff88809daefa48 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: ffff88809db34580 R12: 00000000000239d8
R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd27a1cff8 CR3: 0000000091648000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3994
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x8c/0xbf kernel/locking/spinlock.c:160
 lock_timer_base+0x58/0x190 kernel/time/timer.c:921
 del_timer kernel/time/timer.c:1153 [inline]
 del_timer+0x8b/0xe0 kernel/time/timer.c:1144
 tipc_subscrb_subscrp_delete+0x15b/0x380 net/tipc/subscr.c:207
 tipc_subscrb_delete net/tipc/subscr.c:238 [inline]
 tipc_subscrb_release_cb+0x13/0x40 net/tipc/subscr.c:316
 tipc_close_conn+0x169/0x210 net/tipc/server.c:203
 tipc_send_to_sock net/tipc/server.c:538 [inline]
 tipc_send_work+0x434/0x540 net/tipc/server.c:564
 process_one_work+0x813/0x1540 kernel/workqueue.c:2116
 worker_thread+0x5d1/0x1070 kernel/workqueue.c:2250
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: 00 c7 40 18 00 00 00 00 48 8d 65 d8 44 89 e0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 ac 2e 00 00 49 81 3c 24 60 45 9b 89 0f 84 43 
RIP: __lock_acquire+0x1ba/0x4620 kernel/locking/lockdep.c:3365 RSP: ffff88809daef8a0
---[ end trace 809049d45685fc4e ]---